3M FFP1 Respirator Valved Fold-flat Cool Flow Reinforced-material Ref 9312A [ Pack 10].- Headband material keeps a near constant tension, reducing strap pressure & ensuring secure fit.- 3M Cool Flow exhalation valve minimises heat built up.- The advanced three panel design of the 9300 series means they are easier to breathe through & not prone to collapse.- Foldable design offers more convenience than traditional cup shaped respirators.- enhanced comfort.- Packed 10.